Looking for an architect in Simi Valley, CA? Describe your project once and up to three architects and designers who work in Simi Valley and Ventura County get back to you with a quote. It's free and there is no obligation.
Simi Valley is home to about 125,778 people (2024 Census Bureau estimate), a stable community (−0.5% since 2020). With 3,027 people per sq mi, it is a suburban area. New homes, additions and remodels here go through zoning and building review, where complete drawings are required.
Simi Valley at a glance
- Population (Census Bureau estimate, 2024)
- 125,778 (−0.5% since 2020)
- Rank in California
- 48th of 482 cities and towns
- Land area
- 42 sq mi
- Population density
- 3,027 people per sq mi (suburban)
- Type
- City (Simi Valley city)
- Main county
- Ventura County
What to check before hiring in Simi Valley
- License: in California, check the architect's license with the state board.
- Zoning: setbacks, height limits and lot coverage shape what you can build: ask the architect to check them first.
- Scope: design, permit set and construction support are often priced separately.
- Fees: compare fixed fees and percentages on the same scope.
Useful official resources
Services available in Simi Valley
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Custom home design
Design of a new home, from concept to permit and construction drawings.
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Addition or remodel plans
Plans for an addition or a major remodel, ready for the permit and the builder.
Frequently asked questions in Simi Valley
How much does an architect cost in Simi Valley, CA?
It depends on the project size, complexity and the services. Describe your project: architects who serve Simi Valley send a proposal.
How long does design take?
From a few weeks for small projects to several months for a custom home, plus permit review.
Can I use stock plans?
Yes, often adapted by a local designer to meet local codes and site conditions.
Which architects and designers will contact me?
Up to three independent architects and designers who serve Simi Valley and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.